def signed_deposit(self) -> DepositData:
domain = compute_deposit_domain(fork_version=self.fork_version)
signing_root = compute_signing_root(self.deposit_message, domain)
signed_deposit = DepositData(**self.deposit_message.as_dict(),
signature=bls.Sign(
self.signing_sk, signing_root))
return signed_deposit
def signed_deposit(self) -> DepositData:
domain = compute_deposit_domain(
fork_version=self.chain_setting.GENESIS_FORK_VERSION)
signing_root = compute_signing_root(self.deposit_message, domain)
signed_deposit = DepositData(**self.deposit_message.as_dict(),
signature=bls.Sign(
self.signing_sk, signing_root))
return signed_deposit
def validate_deposit(deposit_data_dict: Dict[str, Any]) -> bool:
'''
Checks whether a deposit is valid based on the eth2 rules.
https://github.com/ethereum/eth2.0-specs/blob/dev/specs/phase0/beacon-chain.md#deposits
'''
pubkey = BLSPubkey(bytes.fromhex(deposit_data_dict['pubkey']))
withdrawal_credentials = bytes.fromhex(
deposit_data_dict['withdrawal_credentials'])
amount = deposit_data_dict['amount']
signature = BLSSignature(bytes.fromhex(deposit_data_dict['signature']))
deposit_message_root = bytes.fromhex(
deposit_data_dict['deposit_data_root'])
fork_version = bytes.fromhex(deposit_data_dict['fork_version'])
# Verify deposit amount
if not MIN_DEPOSIT_AMOUNT < amount <= MAX_DEPOSIT_AMOUNT:
return False
# Verify deposit signature && pubkey
deposit_message = DepositMessage(
pubkey=pubkey,
withdrawal_credentials=withdrawal_credentials,
amount=amount)
domain = compute_deposit_domain(fork_version)
signing_root = compute_signing_root(deposit_message, domain)
if not bls.Verify(pubkey, signing_root, signature):
return False
# Verify Deposit Root
signed_deposit = DepositData(
pubkey=pubkey,
withdrawal_credentials=withdrawal_credentials,
amount=amount,
signature=signature,
)
return signed_deposit.hash_tree_root == deposit_message_root
def validate_deposit(deposit_data_dict: Dict[str, Any],
credential: Credential) -> bool:
'''
Checks whether a deposit is valid based on the eth2 rules.
https://github.com/ethereum/eth2.0-specs/blob/dev/specs/phase0/beacon-chain.md#deposits
'''
pubkey = BLSPubkey(bytes.fromhex(deposit_data_dict['pubkey']))
withdrawal_credentials = bytes.fromhex(
deposit_data_dict['withdrawal_credentials'])
amount = deposit_data_dict['amount']
signature = BLSSignature(bytes.fromhex(deposit_data_dict['signature']))
deposit_message_root = bytes.fromhex(
deposit_data_dict['deposit_data_root'])
fork_version = bytes.fromhex(deposit_data_dict['fork_version'])
# Verify pubkey
if len(pubkey) != 48:
return False
if pubkey != credential.signing_pk:
return False
# Verify withdrawal credential
if len(withdrawal_credentials) != 32:
return False
if withdrawal_credentials[:
1] == BLS_WITHDRAWAL_PREFIX == credential.withdrawal_prefix:
if withdrawal_credentials[1:] != SHA256(credential.withdrawal_pk)[1:]:
return False
elif withdrawal_credentials[:
1] == ETH1_ADDRESS_WITHDRAWAL_PREFIX == credential.withdrawal_prefix:
if withdrawal_credentials[1:12] != b'\x00' * 11:
return False
if credential.eth1_withdrawal_address is None:
return False
if withdrawal_credentials[12:] != credential.eth1_withdrawal_address:
return False
else:
return False
# Verify deposit amount
if not MIN_DEPOSIT_AMOUNT < amount <= MAX_DEPOSIT_AMOUNT:
return False
# Verify deposit signature && pubkey
deposit_message = DepositMessage(
pubkey=pubkey,
withdrawal_credentials=withdrawal_credentials,
amount=amount)
domain = compute_deposit_domain(fork_version)
signing_root = compute_signing_root(deposit_message, domain)
if not bls.Verify(pubkey, signing_root, signature):
return False
# Verify Deposit Root
signed_deposit = DepositData(
pubkey=pubkey,
withdrawal_credentials=withdrawal_credentials,
amount=amount,
signature=signature,
)
return signed_deposit.hash_tree_root == deposit_message_root
def test_compute_deposit_domain(fork_version, valid, result):
if valid:
assert compute_deposit_domain(fork_version) == result
else:
with pytest.raises(ValueError):
compute_deposit_domain(fork_version)